Dreyf, a Commander, was an Imperial Intelligence official. He operated on the Star Destroyer named Chimaera in 19 ABY, serving the Galactic Empire.
Dreyf, a dedicated follower of Supreme Commander and later Fleet Admiral Gilad Pellaeon, received the duty of looking into financial discrepancies. These discrepancies were located in the records of Muunilinst and involved Moff Vilim Disra, Lord Graemon (whom he disdainfully called "a snake"), and General Jaron Kyte.
Subsequently, Dreyf accompanied Pellaeon to Disra's residence on Bastion to challenge the Moff about the misused funds. These funds had been diverted to the Cavrilhu Pirates. While they were in Disra's office, Dreyf, following Pellaeon's instructions, managed to force open the Moff's desk. This revealed datacards containing files that showed Disra's involvement in numerous offenses against the Empire, leading to the corrupt politician's imminent arrest.